<!DOCTYPE html>
<html>
<!-- Created by GNU Texinfo 7.1.1, https://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!-- Copyright © 1988-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Funding Free Software", the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<title>Insn Attributes (GNU Compiler Collection (GCC) Internals)</title>

<meta name="description" content="Insn Attributes (GNU Compiler Collection (GCC) Internals)">
<meta name="keywords" content="Insn Attributes (GNU Compiler Collection (GCC) Internals)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta name="viewport" content="width=device-width,initial-scale=1">

<link href="index.html" rel="start" title="Top">
<link href="Option-Index.html" rel="index" title="Option Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Machine-Desc.html" rel="up" title="Machine Desc">
<link href="Conditional-Execution.html" rel="next" title="Conditional Execution">
<link href="Peephole-Definitions.html" rel="prev" title="Peephole Definitions">
<style type="text/css">
<!--
a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
span:hover a.copiable-link {visibility: visible}
-->
</style>


</head>

<body lang="en">
<div class="section-level-extent" id="Insn-Attributes">
<div class="nav-panel">
<p>
Next: <a href="Conditional-Execution.html" accesskey="n" rel="next">Conditional Execution</a>, Previous: <a href="Peephole-Definitions.html" accesskey="p" rel="prev">Machine-Specific Peephole Optimizers</a>, Up: <a href="Machine-Desc.html" accesskey="u" rel="up">Machine Descriptions</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<h3 class="section" id="Instruction-Attributes"><span>17.19 Instruction Attributes<a class="copiable-link" href="#Instruction-Attributes"> &para;</a></span></h3>
<a class="index-entry-id" id="index-insn-attributes"></a>
<a class="index-entry-id" id="index-instruction-attributes"></a>

<p>In addition to describing the instruction supported by the target machine,
the <samp class="file">md</samp> file also defines a group of <em class="dfn">attributes</em> and a set of
values for each.  Every generated insn is assigned a value for each attribute.
One possible attribute would be the effect that the insn has on the machine&rsquo;s
condition code.
</p>

<ul class="mini-toc">
<li><a href="Defining-Attributes.html" accesskey="1">Defining Attributes and their Values</a></li>
<li><a href="Expressions.html" accesskey="2">Attribute Expressions</a></li>
<li><a href="Tagging-Insns.html" accesskey="3">Assigning Attribute Values to Insns</a></li>
<li><a href="Attr-Example.html" accesskey="4">Example of Attribute Specifications</a></li>
<li><a href="Insn-Lengths.html" accesskey="5">Computing the Length of an Insn</a></li>
<li><a href="Constant-Attributes.html" accesskey="6">Constant Attributes</a></li>
<li><a href="Mnemonic-Attribute.html" accesskey="7">Mnemonic Attribute</a></li>
<li><a href="Delay-Slots.html" accesskey="8">Delay Slot Scheduling</a></li>
<li><a href="Processor-pipeline-description.html" accesskey="9">Specifying processor pipeline description</a></li>
</ul>
</div>



</body>
</html>
